75139457 has 2 divisors, whose sum is σ = 75139458. Its totient is φ = 75139456.

The previous prime is 75139451. The next prime is 75139481. The reversal of 75139457 is 75493157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54745201 + 20394256 = 7399^2 + 4516^2 .

It is a cyclic number.

It is not a de Polignac number, because 75139457 - 2¹⁴ = 75123073 is a prime.

It is a super-3 number, since 3×75139457³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75139451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37569728 + 37569729.

It is an arithmetic number, because the mean of its divisors is an integer number (37569729).

Almost surely, 2^75139457 is an apocalyptic number.

It is an amenable number.

75139457 is a deficient number, since it is larger than the sum of its proper divisors (1).

75139457 is an equidigital number, since it uses as much as digits as its factorization.

75139457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 132300, while the sum is 41.

The square root of 75139457 is about 8668.3018521507. The cubic root of 75139457 is about 421.9775543418.

The spelling of 75139457 in words is "seventy-five million, one hundred thirty-nine thousand, four hundred fifty-seven".